This versatile player can play a veritable alphabet soup of video format, from FLV to MKV and MOV, without requiring the installation of external codecs or plugins, is capable of streaming movies directly from a Web address, and even lets you edit the subtitles stored in your files.

The app lets you create a log of every activity in your life—from working, to exercising, to dealing with house chores. Its simple interface helps you categorize everything, and can even produce charts that explain how you spend your most precious resource.

The MicroWave Team’s $23 MicroWave (Mac App Store Link) is like a Swiss Army knife, except that, instead of using it to cut things, it lets you record and edit great-sounding audio.

The app can be used for anything from recording the latest episode of your podcast to digitizing your old vinyl records, and offers many options for adding effects to your end product and optimizing its quality.

Care for a little math? Daniel Alm’s $10 PocketCAS (Mac App Store Link) makes short work of everything from equations to graphs with a simple and intuitive interface.

Ideal for everyone from the high school student to the professional engineer, the app supports linear algebra, calculus, and physics operations. PocketCAS also offers up full scripting capabilities, and can plot both two- and three-dimensional graphs.